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74F157 |
INTEGRATED CIRCUITS |
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74F157*, 74F157A, 74F158*, 74F158A
Data selectors/multiplexers
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
Product specification |
1996 Mar 12 |
IC15 Data Handbook
m n r
Philips Semiconductors |
Product specification |
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Data selectors/multiplexers |
74F157A, 74F158A |
74F157A: Quad 2-input data selector/multiplexer, non-inverting 74F158A: Quad 2-input data selector/multiplexer, inverting
DESCRIPTION
The 74F157A is a high speed Quad 2-Input Multiplexer which selects 4 bits of data from one of two sources under the control of a common Select input (S). The Enable input (E) is active when Low.
When E is High, all of the outputs (Yn) are forced Low regardless of all other input conditions.
Moving data from two registers to a common output bus is a common use of the 74F157A. The state of the Select input determines the particular register from which the data comes.
The device is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input.
The 74F158A is similar, but has inverting outputs (Yn).
ORDERING INFORMATION
•Industrial temperature range (±10°C to +85°C) available for
74F157A
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TYPICAL |
TYPICAL |
TYPE |
PROPAGATION |
SUPPLY CURRENT |
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DELAY |
(TOTAL) |
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74F157 |
4.6ns |
15mA |
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74F157A |
4.6ns |
15mA |
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74F158 |
3.7ns |
10mA |
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74F158A |
3.7ns |
10mA |
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ORDER CODE |
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DESCRIPTION |
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PKG. DWG. # |
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COMMERCIAL RANGE |
INDUSTRIAL RANGE |
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VCC = 5V ±10%, Tamb = 0°C to +70°C |
VCC = 5V ±10%, Tamb = ±40°C to +85°C |
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16-pin plastic DIP |
N74F157AN, N174F158AN |
I74F157AN |
SOT38-4 |
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16-pin plastic SO |
N74F157AD, N74F158AD |
I74F157AD |
SOT109-1 |
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
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PINS |
DESCRIPTION |
74F (U.L.) HIGH/LOW |
LOAD VALUE HIGH/LOW |
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Ina, Inb, Inc, Ind |
Data inputs |
1.0/1.0 |
20μA/0.6mA |
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S |
Select input |
1.0/1.0 |
20μA/0.6mA |
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Enable input |
1.0/1.0 |
20μA/0.6mA |
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E |
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Ya±Yd |
Data outputs (74F157/74F157A) |
50/33 |
1.0mA/20mA |
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Data outputs (74F158/74F158A) |
50/33 |
1.0mA/20mA |
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Ya±Yd |
NOTE: One (1.0) FAST unit load is defined as: 20μA in the High state and 0.6mA in the Low state. |
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PIN CONFIGURATIONS, 74F157A |
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74F158A |
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S |
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S |
1 |
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16 |
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VCC |
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1 |
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16 |
VCC |
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I0a |
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I0a |
2 |
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15 |
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E |
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2 |
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15 |
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E |
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I1a |
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I0d |
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I1a |
3 |
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14 |
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I0d |
3 |
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14 |
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I1d |
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Ya |
4 |
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13 |
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I1d |
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Ya |
4 |
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13 |
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I0b |
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I0b |
5 |
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12 |
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Yd |
5 |
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12 |
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Yd |
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I1b |
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I0c |
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I1b |
6 |
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11 |
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I0c |
6 |
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11 |
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I1c |
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Yb |
7 |
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10 |
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I1c |
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Yb |
7 |
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10 |
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GND |
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GND |
8 |
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9 |
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Yc |
8 |
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9 |
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Yc |
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SF00215 |
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SF00216 |
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LOGIC SYMBOLS, 74F157A |
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74F158A |
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2 |
3 |
5 |
6 |
11 |
10 |
14 |
13 |
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2 |
3 |
5 |
6 |
11 |
10 |
14 |
13 |
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I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
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I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
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1 |
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S |
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1 |
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S |
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E |
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15 |
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E |
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Ya |
Yb |
Yc |
Yd |
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Ya |
Yb |
Yc |
Yd |
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VCC = Pin 16 |
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VCC = Pin 16 |
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4 |
7 |
9 |
12 |
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4 |
7 |
9 |
12 |
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GND = Pin 8 |
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SF00217 |
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GND = Pin 8 |
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SF00218 |
1996 Mar 12 |
2 |
853-0346 16555 |
Philips Semiconductors |
Product specification |
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Data selectors/multiplexers |
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74F157A, 74F158A |
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IEEE/IEC SYMBOLS, 74F157A |
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74F158A |
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1 |
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G1 |
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1 |
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G1 |
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EN |
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15 |
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EN |
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2 |
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MUX |
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2 |
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MUX |
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3 |
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1 |
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4 |
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3 |
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1 |
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4 |
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1 |
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1 |
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5 |
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7 |
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5 |
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7 |
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6 |
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6 |
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11 |
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9 |
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11 |
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9 |
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10 |
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10 |
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14 |
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12 |
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14 |
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12 |
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13 |
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13 |
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SF00219 |
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SF00220 |
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LOGIC DIAGRAM, 74F157A |
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74F158A |
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I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
E |
S |
I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
E |
S |
2 |
3 |
5 |
6 |
11 |
10 |
14 |
13 |
15 |
1 |
2 |
3 |
5 |
6 |
11 |
10 |
14 |
13 |
15 |
1 |
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4 |
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7 |
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9 |
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12 |
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4 |
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7 |
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9 |
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12 |
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Ya |
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Yb |
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Yc |
Yd |
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Ya |
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Yb |
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Yc |
Yd |
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VCC = Pin 16 |
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VCC = Pin 16 |
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GND = Pin 8 |
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SF00225 |
GND = Pin 8 |
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SF00226 |
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FUNCTION TABLE, 74F157A |
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74F158A |
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INPUTS |
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OUTPUT |
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INPUTS |
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OUTPUT |
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E |
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S |
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I0n |
I1n |
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Yn |
E |
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S |
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I0n |
I1n |
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Yn |
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H |
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X |
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X |
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X |
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L |
H |
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X |
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X |
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X |
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H |
L |
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H |
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X |
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L |
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L |
L |
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L |
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L |
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X |
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H |
L |
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H |
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X |
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H |
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H |
L |
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L |
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H |
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X |
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L |
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L |
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L |
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L |
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X |
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L |
L |
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H |
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X |
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L |
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H |
L |
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L |
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H |
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X |
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H |
L |
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H |
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X |
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H |
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L |
H = High voltage level |
H = High voltage level |
L = Low voltage level |
L = Low voltage level |
X = Don't care |
X = Don't care |
1996 Mar 12 |
3 |